public class MobileTelephone {
      	SIM card;
    	public void useSIM(SIM card) {
      		this.card=card;
  	}
 	public void showMess() {
	  	System.out.println("使用的卡是:"+card.giveCorpName()+"提供的");
      		System.out.println("手机号码是:"+card.giveNumber());
 	}
}
